Questions and Answers

Describe the carbon cycle, limited to: photosynthesis, respiration, feeding, decomposition, formation of fossil fuels and combustion

Explain, in terms of energy loss, why food chains usually have fewer than five trophic levels

Explain why the transfer of energy from one trophic level to another is often not efficient

Discuss the advantages of using a pyramid of energy rather than pyramids of numbers or biomass to represent a food chain

Draw, describe and interpret pyramids of energy

Identify the following as the trophic levels in food webs, food chains and ecological pyramids: producers, primary consumers, secondary consumers, tertiary consumers and quaternary consumers

Describe a trophic level as the position of an organism in a food chain, food web or ecological pyramid

Discuss the advantages of using a pyramid of biomass rather than a pyramid of numbers to represent a food chain

Draw, describe and interpret pyramids of numbers and pyramids of biomass

Use food chains and food webs to describe the impact humans have through overharvesting of food species and through introducing foreign species to a habitat